{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-xcxqdjde","versions":[{"created_at":"2026-06-10T22:54:17Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21141931 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"760d7758e6e854f7c411a950d4f14f7f0753e07eb5d25424110fa05a6e2df84e","version":10},{"created_at":"2026-06-10T17:39:27Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"3ad12dcd082768416a029e7241c00aacdf55d46724a670b59019ff5486beb816","version":3}]}